Help with identify LAT and LONG from addresses

Hello. I clarify that I am not a professional but I am learning. I appreciate if someone helps me figure out how to identify LAT and LONG from addresses to later calculate distances.
I have read previous posts but some things generate some confusion for me. Now I loaded a plugin in my source (googlesheets) but I don’t think it is the best option.
Maybe someone knows a better way to solve it.
Sorry if the query is obvious or if it has already been answered before.